{"product_id":"soundqubed-s4-100-s-series-4-channel-amplifier-175x4","title":"SoundQubed S4-100 S Series 4 Channel Amplifier (175x4)","description":"\u003ch2\u003e\n\u003cstrong\u003eSoundQubed S4-100\u003c\/strong\u003e — 4-Channel Amplifier | S-Series | Class D | 175W x 4 @ 2Ω\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSoundQubed S4-100\u003c\/strong\u003e is a high-efficiency Class D 4-channel amplifier built for enthusiasts who want clean, versatile power for their full car audio system. Delivering \u003cstrong\u003e100W x 4 at 4Ω\u003c\/strong\u003e, \u003cstrong\u003e175W x 4 at 2Ω\u003c\/strong\u003e, and \u003cstrong\u003e370W x 2 bridged at 4Ω\u003c\/strong\u003e, the S4-100 balances deep, loud low-end with power for mids and highs — all from a remarkably compact \u003cstrong\u003e7.87\" x 7.75\" x 2.24\"\u003c\/strong\u003e chassis. Whether you’re powering a full set of component speakers, running a dedicated mid-range and tweeter setup, or bridging channels for more power to select speakers, the S4-100 has the flexibility to do it all.\u003c\/p\u003e\n\n\u003cp\u003eThe S4-100 features a comprehensive crossover suite: a \u003cstrong\u003ehigh-pass filter\u003c\/strong\u003e to direct precisely tuned tones to your tweeters and midrange speakers, a \u003cstrong\u003elow-pass filter (50 Hz–5 kHz)\u003c\/strong\u003e for controlling low-frequency content, and a \u003cstrong\u003ebandpass filter\u003c\/strong\u003e for defining both the high and low ends of your mid-range speaker tone. Input sensitivity runs from \u003cstrong\u003e0.2V to 8V\u003c\/strong\u003e for compatibility with virtually any head unit or DSP. Power connections use \u003cstrong\u003e4-gauge set screw terminals\u003c\/strong\u003e for clean current flow, and \u003cstrong\u003e10-gauge speaker terminals\u003c\/strong\u003e ensure consistent voltage delivery to your speakers. Operating across a \u003cstrong\u003e12V–15.8V\u003c\/strong\u003e working voltage range with a maximum amperage draw of \u003cstrong\u003e75A\u003c\/strong\u003e, the S4-100 is compatible with most stock electrical systems.\u003c\/p\u003e\n\n\u003cp\u003eWith a frequency response of \u003cstrong\u003e10 Hz–40 kHz\u003c\/strong\u003e, a signal-to-noise ratio greater than \u003cstrong\u003e80 dB\u003c\/strong\u003e, and a damping factor greater than \u003cstrong\u003e100\u003c\/strong\u003e, the S4-100 delivers clean, accurate sound reproduction across all four channels. It’s the perfect foundation for a full front stage build — or a complete system when paired with a dedicated subwoofer amplifier.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the SoundQubed S4-100?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100W x 4 @ 4Ω \/ 175W x 4 @ 2Ω \/ 370W x 2 Bridged @ 4Ω\u003c\/strong\u003e — Flexible power configurations for full-system builds, component setups, and bridged applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass D Efficiency\u003c\/strong\u003e — High-efficiency design minimizes heat and maximizes power delivery — runs cool even in compact installs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHPF + LPF + Bandpass Crossover Suite\u003c\/strong\u003e — Full crossover flexibility for precise frequency control across all four channels without a separate DSP.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact 7.87\" x 7.75\" x 2.24\" Chassis\u003c\/strong\u003e — One of the smallest 4-channel amplifiers available — fits under seats, in doors, and in tight custom installs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4GA Power Terminals + 10GA Speaker Terminals\u003c\/strong\u003e — Clean current flow and consistent voltage delivery for reliable daily performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10 Hz–40 kHz Frequency Response\u003c\/strong\u003e — Full-range reproduction from deep sub-bass to extended high frequencies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12V–15.8V Working Voltage \/ 75A Max Draw\u003c\/strong\u003e — Compatible with most stock electrical systems — no major electrical upgrades required for most builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2Ω Stereo \/ 4Ω Bridged Stable\u003c\/strong\u003e — Flexible impedance compatibility for a wide range of speaker configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSystem Configuration Recommendations\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eFull Front Stage Build:\u003c\/strong\u003e Run all four channels at 2Ω for 175W per channel to a full set of component speakers. Use the HPF to protect your tweeters and midrange speakers from low-frequency content. The bandpass filter is ideal for separating mid-range speaker tone from your tweeters in a 3-way component setup.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFront Stage + Subwoofer:\u003c\/strong\u003e Use channels 1\/2 for front component speakers (HPF filtered) and bridge channels 3\/4 for a subwoofer or mid-bass driver (LPF filtered) for 370W. Pair with a dedicated SoundQubed S1-850.1 or S1-1250 monoblock for a complete, well-matched system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eElectrical Requirements:\u003c\/strong\u003e The S4-100 draws a maximum of 75A and operates from 12V–15.8V, making it compatible with most stock electrical systems. A standard 4-gauge wiring kit is all you need for clean, reliable performance at full output.\u003c\/p\u003e\n\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n      \u003cth style=\"background-color:#222;color:#fff;padding:8px;text-align:left;\"\u003eS4-100\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eAmplifier Class\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eChannels\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eWorking Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e12V – 15.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eMaximum Amperage\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eRMS Power @ 4 Ohm — 4-Channel\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e100W x 4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eRMS Power @ 2 Ohm — 4-Channel\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e175W x 4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eRMS Power @ 4 Ohm — Bridged (2-Channel)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e370W x 2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e10 Hz – 40 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eSignal to Noise Ratio\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u0026gt;80 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eDamping Factor\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u0026gt;100\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e0.2V – 8V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eHigh-Pass Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e20 Hz – 5 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eLow-Pass Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e50 Hz – 5 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eBandpass Filter\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eMinimum Impedance (Stereo)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eMinimum Impedance (Bridged)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e4 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003ePower Terminal Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e4 Gauge (Set Screw)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eSpeaker Terminal Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e10 Gauge (Set Screw)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e7.87\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003eOverall Width\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e7.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f2f2f2;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003eOverall Height\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2.24\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can the S4-100 power my whole car audio system?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes — use channels 1\/2 for front speakers (HPF filtered) and bridge channels 3\/4 for a mid-bass driver or subwoofer (LPF filtered). For a complete system with dedicated sub bass, pair it with a SoundQubed S1-850.1 or S1-1250 monoblock.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What’s the minimum impedance for bridged mode?\u003c\/strong\u003e\u003cbr\u003e\nA: The S4-100 is stable at \u003cstrong\u003e4Ω in bridged mode\u003c\/strong\u003e and \u003cstrong\u003e2Ω in stereo mode\u003c\/strong\u003e. Do not bridge into a load below 4Ω.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will the S4-100 work with my stock electrical system?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes — the S4-100 draws a maximum of 75A and operates from 12V–15.8V, making it compatible with most stock electrical systems. A standard 4-gauge wiring kit is all you need.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What speakers pair best with the S4-100?\u003c\/strong\u003e\u003cbr\u003e\nA: Any component or coaxial speakers rated between 75–175W RMS are a great match. SoundQubed’s mid-range speakers and tweeters are purpose-built to pair with the S-Series amplifier lineup for maximum sound quality and volume.\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Default Title","offer_id":49849770180836,"sku":null,"price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/2522\/9028\/files\/S4-100_top_picture__60833.webp?v=1789257329","url":"https:\/\/www.12voltoutlet.com\/products\/soundqubed-s4-100-s-series-4-channel-amplifier-175x4","provider":"12 Volt Outlet","version":"1.0","type":"link"}